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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
For 1% H.SO, solution find it's normality (approx)0 10.1 (2) 0.2 (3)0.4 (4) 0.02NE |
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Answer» cbshshhwuqfw7wfwufsywgsus |
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| 2. |
Calculate the no. of atomes and volume of 4.2g of N2 |
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Answer» m/M=N/No. 4.2/14=N/6.022x10²³ Now ... 0.3x6.022x10²³ Solving We GOT N=1.8x10²³ Explanation: |
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| 4. |
Arrange the following solutions in order of increasing osmotic pressure. Assume complete ionization.a) 0.5 m Li2SO4b) 0.5 m KCIc) 0.5 m Al2(SO4)3 d) 0.1 m BaCl2 |
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Answer» B) c) a) MAY it help u..... |
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| 5. |
· poisonous gas is present in theexhaust fumes of car.(a) Methane(b) Acetylene(c)HCI(d) Carbon dioxide |
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| 7. |
Find out the number of molecule of hydrozen atom 15 gm of hydrozen |
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Answer» Answer: YRRRR GUYS PLZZZ MARK me as a BRAINLIEST |
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| 8. |
What type of semiconductor obtained when Si or Ge are doped with elements of group 13 such as B or Al and why? |
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Answer» p -TYPE due to the FORMATION of electron hole for DETAILED answer check Wikipedia |
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| 9. |
4. Why is an5. What are the end products of fermentation?n. What is comensation point? How is it related to photosy |
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Answer» Answer: hi mate , 4 . did not understood sorry 5. USUALLY this is pyruvate formed from sugar through glycolysis. The reaction produces NAD+ and an organic product, typical examples being ethanol, lactic acid, and hydrogen gas (H2), and often also carbon dioxide. However, more exotic compounds can be PRODUCED by fermentation, such as butyric acid and acetone. 6.compensation point The point reached in a plant when the rate of PHOTOSYNTHESIS is EQUAL to the rate of respiration. This means that the carbon dioxide RELEASED from respiration is equivalent to that which is taken up during photosynthesis. hope this helps follow me mark as brilliant |
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| 10. |
✨Answer this question guys✨✨✨A drop (1 ml) of acid having PH=1 is added in 1 litre water.The PH of 1 litre water becomea)7b)6c)4d)1Don't google it.. |
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Answer» its 7 |
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| 11. |
What is chemical change and Physical change |
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Answer» Answer: physical change are those CHANGES in which no new substance is formed only state of that substance is CHANGED ex water, ice and water VAPOUR chemical change are those changes in which new substance is formed and its properties are TOTALLY different from previous one ex cooking, RUSTING |
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| 12. |
You have two solutions, A and B. The pH of solution A is 6 and pH Osolution B is 8. Which solution has more hydrogen ion concentrationWhich of this is acidic and which one is basic?the titre ofth |
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Answer» Answer: Solution A has higher HYDROGEN ion concentration. A is acidic and B is Basic. Explanation: If pH < 7 - solution is acidic pH = 7 - solution is neutral and pH > 7 - solution is basic. Since, pH of solution A = 6 - it is acidic. and pH of solution B = 8, it is basic. Also More acidic the solution, higher is is the concentration of Hydrogen ions ( Since, A is acidic hence A has more concentration of hydrogen ions. Hope you find this helpful. Please rate this answer! |
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| 13. |
Cu +HNO, → Cu(NO3), + NO + H20 balance the equation |
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Answer» Answer: |
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| 14. |
2. Element having a completened walence shell |
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Answer» Answer: Group 18 elements (helium, neon, and argon are shown) have a full outer, or valence, shell. A full valence shell is the most stable ELECTRON CONFIGURATION. Elements in other groups have partially-filled valence shells and gain or LOSE electrons to achieve a stable electron configuration. Explanation: hope it helps you...!!!... |
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| 15. |
Percentage3. Which of the following has the largestnumber of atom *(1 Point).5 gm atom of Cu0.635 gm of Cu.25 moles of Cu atom11 gm of Cu |
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Answer» 25 moles of copper Explanation: Because MOLAR MASS of a substance is defined as the molar mass into grams~ 25 moles of CU = 25 grams please like my answer if it's helpful |
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| 16. |
KTime: 35 minsChemistry Class - XI...10.2.74 gm of compound gave on analysis1.9 gm of silver, .268 gm of sulphour and.538 of oxgen. Calculate the empiricalformula of the compound *(3 Points)O Ag2SO4AgzS04AgSO4None of these |
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Answer» Answer: AgzS04 this is the answer PLZ MARK ME AS BRAINLIST AND FOLLOW ME PLEASE ☺️ |
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| 17. |
Draw a diagram showing the arrangement of the valency electrons in one moleculeof the covalent compound selenium chloride.Use x to represent an electron from an atom of selenium.Use o to represent an electron from an atom of chlorine. |
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Answer» upfpudy lhxodogdoydoydoydoydoydoydoydoydyodoydoydodydoydoditdo |
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| 18. |
14. Name the solute and solvent in aerated drinks.15. What happens when saturated solution is allowed to cool?16. Name the process used to obtain pure sugar from sugar solution.17. A mixture of alcohol and water is a homogeneous while that of oil and water is heterogeneous. Justify the statement.18. What will you observe when dilute hydrochloric acid is added to a mixture of Iron filings and sulphur powder?19. When a beam of light was passed through a solution of substance A dissolved in water, the path of light could be seen. What is this phenomenon called? What is the nature of the solution?20. Name the process you would use to separate a mixture of naphthalene and common salt. |
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Answer» Answer: |
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| 19. |
ClassmateDatePageCalculate the volume & occupied by 6) 28 unvi ) 21g of Naga, Anat sipMieleImanol N2 = 28 g |
| Answer» JAMIL emakavdvdhdjndbdbdnxcm | |
| 21. |
Name four human activities which cause air pollution |
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Answer» Answer: 1} they fire the WOOD |
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| 22. |
5. Hectare is a unit of(a) mass(c) time(b) area(d) temperaturetements |
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| 23. |
भू परत किसे कहते हैं |
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Answer» भूपर्पटी या क्रस्ट (अंग्रेज़ी: CRUST) भूविज्ञान में किसी पथरीले ग्रह या प्राकृतिक उपग्रह की सबसे ऊपर की ठोस परत को कहते हैं। ... इस गोलाकार पृथ्वी की पर्पटी की संतरे के छिलके से तुलना की जा सकती है। मोटाई के आधार पर यह सबसे पतली परत है और इसकी औसत मोटाई लगभग ३३ कि॰ मी॰ मानी जाती है। |
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| 24. |
CHEMICAL EQUATION WITH CHEMICAL FORMULA PLEASE HELP ME SOLVE THIS QUESTION |
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Answer» Answer: #bts_army hii friend here is your answer Explanation: please mark me as brilentest answer and subscribe to my youtube CHANNEL |
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| 25. |
30 g acetic acid mixed with 500 ml of water.what could be thenormality of the a solution |
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Answer» Answer: 15.3 Explanation: |
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| 26. |
In NaCl number of schottky pairs and number of ions per 1 CC is about respectively |
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Answer» In NACL NUMBER of SCHOTTKY pairs are10⁶ cm³at room temperature and 10²² ions are present |
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| 27. |
What is the use of the stirrer in finding specific heat of a solid experiment |
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Answer» Explanation: |
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| 28. |
A anhydrous salt which used to test water as it changes colur when water is added |
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| 29. |
PV=W/M RT somikarane M rashir ekak ki hobe ta matria bisleswan ki hobe |
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Answer» আমার মনে হয় চাপ হবে,M রাশির একক। |
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| 30. |
A green layer is gradually formed on a copper plate left exposed to air for a week in a bathroom .what could this green substance be (a) aluminum oxide is considered as an amphoteric oxide. (b) ionic compounds conduct electricity in molten state? |
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Answer» shshrryry4ueu5du5su5sutsytsu5d5udurvknKFYyjkyjjtyjdjdjydtjxjtxhdj |
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| 31. |
88g of gas at stp is kept ina gas jar how many moles of co2 are present in the gas jar |
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Answer» MOLAR MASS of CO2 = 12+16×2 = 44g GIVEN mass = 88g moles = given mass/molar mass = 88/44 = 2 moles |
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| 32. |
Name of the reaction which requires HI and P as catalyst for preparation of alkanes |
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Answer» The Wurtz reaction, named after Charles Adolphe Wurtz, is a coupling reaction in organic chemistry, organometallic chemistry and recently inorganic main group polymers, whereby two alkyl HALIDES are REACTED with sodium metal in dry ether solution to form a higher alkane. Explanation: Helpful to you |
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| 33. |
Anamolous behaviour |
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Answer» Answer: Explanation:Anomalous BEHAVIOUR of an element refers to the deviation of the properties and behaviour of an element from its USUAL or normal behaviour. It is DUE to the following reasons: (i) EXCEPTIONALLY small SIZE of its atom and ion.
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| 34. |
How many number of carbon atoms are joined in a |
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Answer» Answer: Explanation: The value of the mole is equal to the number of atoms in exactly 12 GRAMS of pure carbon-12. 12.00 g C-12 = 1 MOL C-12 atoms = 6.022 × 1023 atoms • The number of particles in 1 mole is called AVOGADRO's Number (6.0221421 X 1023). |
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| 35. |
How is tradal energy harnessed for producing electricity? |
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Answer» Answer: Tidal energy is produced through the USE of tidal energy generators. These large underwater turbines are placed in areas with HIGH tidal MOVEMENTS, and are designed to capture the kinetic motion of the ebbing and surging of ocean tides in order to PRODUCE electricity. Explanation: I hope u get HELP from it |
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| 36. |
On heating, metals usually A) expand B) contract C) both a and b D) none of the above |
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| 37. |
1.00 gram of oxygen combine with 0.126 gram of hydrogen to form 1.00 gram of nitrogen combined with 0.2 16 gram of hydrogen to form NH3 predict the weight of oxygen required to combine with1.00g of nitrogen to form an oxide |
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Answer» The MASS of OXYGEN will be 1.67 gO Explanation: = 1.00 gN × 0.216 GH/1.00 gN × 1.00 gO/0.126 gH = 1.67 gO mark as brainliest |
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| 38. |
Kya thanku pahle tum mujhe bhi de do☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️ |
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Answer» Answer: YEAH you are RIGHT and please FOLLOW me and MARK me as the BRAINLIEST |
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| 39. |
Calculate Molarity of ..10 % hcl of density 1.10g |
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Answer» Explanation: Hi, Hope this helps!! in equals space 38 over 365 space mol space equals space 1.04 space mol therefore space Molarity space of space HCl space solution space equals space fraction numerator 1.04 space mol over denominator 84.1000 space straight L end fraction space equals space bold 12 bold. bold 4 bold space bold mol bold space bold L to the power of bold minus bold 1 end exponent left parenthesis straight b RIGHT parenthesis space Molarity space of space conc. space HCl space sample space equals space 12.38 space mol DIVIDED by straight L Molarity space of space HCl space solution space to space be space prepared space equals space 0.10 space mol divided by straight L Volume space of space HCl space solution space to space be space prepared space equals space 1.00 space straight L space equals space 1000 space mL By space using space molarity space equation comma straight M 1 straight V 1 space equals space straight M 2 straight V 2 VHCl space equals space fraction numerator 0.10 space cross times space 1000 over denominator 12.38 end fraction space mL space equals space bold 8 bold. bold 07 bold space bold mL Thus comma space to space obtain space 1.0 straight L space of space 0.10 space straight M space HCl comma space one space should space dissolve space 8.08 space mL space of space CONCENTRATED space HCl space to space make space the space volume space to space 1.0 straight L. end style |
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| 40. |
If a volume vs temperature graph is plotted in degree centigrade at constant pressure, at what temperature the linecuts the temperature acids? |
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Answer» Answer: A graph is plotted between pressure and volume at DIFFERENT temperature. On the basis of the graph Volume DECREASE when pressure is INCREASED at constant temperature. When temperature is decreased at constant pressure, the volume DECREASES. |
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| 41. |
What are the effects of neutralisation reaction donor take place |
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Answer» Answer:In CHEMISTRY, neutralization or neutralisation (see spelling differences) is a chemical reaction in which acid and a base react quantitatively with each other. In a reaction in water, neutralization results in there being no excess of hydrogen or hydroxide ions present in the solution. The pH of the neutralized solution depends on the acid strength of the reactants.In the context of a chemical reaction the term neutralization is used for a reaction between an acid and a base or alkali. Historically, this reaction was represented as acid + base (alkali) → salt + water For example: HCl + NaOH → NaCl + H2O The statement is still valid as long as it is understood that in an aqueous solution the substances involved are subject to dissociation, which changes the substances ionization state. The arrow sign, →, is used because the reaction is complete, that is, neutralization is a quantitative reaction. A more general definition is based on Brønsted–Lowry acid–base theory. AH + B → A + BH Electrical charges are omitted from generic expressions such as this, as each species A, AH, B, or BH may or may not carry an electrical charge. Neutralization of sulphuric acid provides a specific example. Two partial neutralization reactions are possible in this instance. H2SO4 + OH− → HSO4−+ H2O HSO4− + OH− → SO42−+ H2O Overall: H2SO4 + 2OH− → SO42−+ 2H2O After an acid AH has been neutralized there are no molecules of the acid (or hydrogen ions produced by dissociation of the MOLECULE) left in solution. When an acid is neutralized the amount of base added to it must be equal the amount of acid present initially. This amount of base is said to be the equivalent amount. In a titration of an acid with a base, the point of neutralization can also be called the equivalence point. The quantitative nature of the neutralization reaction is most conveniently expressed in terms of the concentrations of acid and alkali. At the equivalence point: volume (acid) × concentration (H+ ions from dissociation) = volume (base) × concentration (OH− ions) In general, for an acid AHn at concentration c1 reacting with a base B(OH)m at concentration c2 the volumes are related by: n v1 c1 = m v2 c2 An example of a base being neutralized by an acid is as follows. Ba(OH)2 + 2H+ → Ba2+ + 2H2O The same equation relating the concentrations of acid and base applies. The concept of neutralization is not limited to reactions in solution. For example, the reaction of limestone with acid such as sulfuric acid is also a neutralization reaction. [Ca,Mg]CO3(s) + H2SO4(AQ) → (Ca2+, Mg2+)(aq) + SO42−(aq) + CO2(g) + H2O Such reactions are important in soil chemistry. Strong acids and strong bases A strong acid is one that is fully dissociated in aqueous solution. For example, HYDROCHLORIC acid, HCl, is a strong acid. HCl(aq) → H+(aq) + Cl−(aq) A strong base is one that is fully dissociated in aqueous solution. For example, sodium hydroxide, NaOH, is a strong base. NaOH(aq) → Na+(aq) + OH−(aq) Therefore, when a strong acid reacts with a strong base the neutralization reaction can be written as H+ + OH− → H2O For example, in the reaction between hydrochloric acid and sodium hydroxide the sodium and chloride ions, Na+ and Cl− take no part in the reaction. The reaction is consistent with the Brønsted–Lowry definition because in reality the hydrogen ION exists as the hydronium ion, so that the neutralization reaction may be written as H3O+ + OH− → H2O + H2O → 2 H2O When a strong acid is neutralized by a strong base there are no excess hydrogen ions left in the solution. The solution is said to be neutral as it is neither acidic nor alkaline. The pH of such a solution is close to a value of 7; the exact pH value is dependent on the temperature of the solution. Neutralization is an exothermic reaction. The standard enthalpy change for the reaction H+ + OH− → H2O is −57.30 kJ/mol. Explanation:BRAINLIST VARNA MAUT |
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| 42. |
Please give the answer to me |
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Answer» SAJAG ECHHA BHUKHA AASHA CHAUBIS |
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| 43. |
Which statement is correct regarding halogens? |
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Answer» Answer: i am not understand your answer PLZ.. CHECK your QUESTION and then re post this question and GET answer. |
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| 44. |
How to find electronic configuration to element 40 |
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Answer» Answer: 2,8,8,18,18,2..... this is the CONFIGURATION, my FRIEND |
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| 45. |
what are n type semiconductors.why is the conductivity of doped n type semiconductor higher than that of pure semiconductor. explain with diagram |
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Answer» N-type SEMICONDUCTORS are those CONDUCTORS that have a pentavalent impurity and have 5 electrons in their VALENCE shell. Explanation: ... The conductivity of the N-type semiconductor is higher than the pure semiconductor because it has more number of dopant elements |
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| 46. |
3) Name the followingi). A lusterous coloured non-metal11) A metal which can melt afterkeeping on palmii) A metal which is poor conductor ofheat |
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Answer» Answer: 1)IODINE & diamond 3)Mercury & lead Explanation: Hope it helps |
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| 47. |
Q1. Show that K= (tr-tm)/ tm. |
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Answer» Answer: Factors that influence the Rt value of the components of a mixture? Boiling TEMPERATURE and polarity of the compound. ... The polarity of the component compounds realtive to the polarity of the STATIONARY phase in the COLUMN. ... Column temperature. ... Flow rate of the carrier GAS. ... Column length. ... Amount of MATERIAL injected. |
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| 48. |
State the two types of particles present in a 2 mole calcium |
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Answer» In ONE mole of CALCIUM there are 6.022 X 10^ 23 atoms please follow me and make me as brainlist |
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| 49. |
Define Boiling and Boiling point? |
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Answer» Boiling is the rapid vaporization of a liquid, which typically occurs when a liquid is heated to a temperature such that its vapor pressure is above that of the SURROUNDINGS, such as AIR pressure. Boiling point is w temperature at which the pressure exerted by the surroundings upon a liquid is equaled by the pressure exerted by the vapour of the liquid; under this CONDITION, addition of heat results in the transformation of the liquid into its vapour WITHOUT RAISING the temperature. |
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| 50. |
What happen when h2so4 is heated with nal |
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Answer» When sodium chloride is HEATED with CONCENTRATED sulphuric ACID in a round bottomed flask it GIVES sodium bisulphate and HCl. hope it HELPS you ☺☺❤❤❤ |
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